78108348517 has 8 divisors (see below), whose sum is σ = 78614774424. Its totient is φ = 77602971648.

The previous prime is 78108348491. The next prime is 78108348551. The reversal of 78108348517 is 71584380187.

It can be written as a sum of positive squares in 4 ways, for example, as 1714705281 + 76393643236 = 41409^2 + 276394^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78108348517 - 2¹¹ = 78108346469 is a prime.

It is a super-2 number, since 2×78108348517² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78108348917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112588 + ... + 410965.

It is an arithmetic number, because the mean of its divisors is an integer number (9826846803).

Almost surely, 2^78108348517 is an apocalyptic number.

It is an amenable number.

78108348517 is a deficient number, since it is larger than the sum of its proper divisors (506425907).

78108348517 is a wasteful number, since it uses less digits than its factorization.

78108348517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524519.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 78108348517 in words is "seventy-eight billion, one hundred eight million, three hundred forty-eight thousand, five hundred seventeen".